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      OpenFOAM 中的热物理类之添加新模型
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        <p>本篇探讨如何增加一个新的热物理模型。</p>
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<p>有了前面的基础，增加一个模型应该不在话下了，这里给出一个例子。<br>关键在调用 <code>makeThermo</code> 宏函数，来将各个子模型组合起来，形成一个新的热物理模型，并添加到合适的 hashTable 里。</p>
<p>这里只看看怎么来增加状态方程模型，transport 模型（描述黏度 随温度的变化），thermo 模型（描述 cp 随温度的变化），energy 模型。将 <code>perfectGas</code>， <code>constTransport</code>， <code>hConstThermo</code>，以及 <code>sensibleInternalEnergy</code> 拷贝出来到一个目录下，并分别重命名为 <code>my+原始模型名</code> 的形式。同时，修改各个模型的typeName，比如， <code>perfectGas</code> 修改为 <code>myperfectGas</code>， <code>myperfectGas.H</code> 的 <code>typeName</code> 修改为：<br><figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">static</span> word <span class="title">typeName</span><span class="params">()</span></span><br><span class="line"></span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="string">"myperfectGas&lt;"</span> + word(Specie::typeName_()) + <span class="string">'&gt;'</span>;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></p>
<p>注意，这里 <code>typeName</code> 一定要改，否则，将在运行算例的时候，出现 <code>duplicate entry</code> 的错误，根本原因在于，将模型添加到 hashTable 的时候，hashTable 的 key 是由 <code>typeName</code> 组合而成的，如果新模型使用了跟旧模型一样的 <code>typeName</code> 就可能会在 hashTable 出现两个一个一样的 key，即 <code>duplicate entry</code>。</p>
<p>然后，将 <code>src/thermophysicalModels/basic/rhoThermo</code> 目录下的 <code>rhoThermos.C</code> 拷贝到新模型所在目录下，并修改为：<br><figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br></pre></td><td class="code"><pre><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "rhoThermo.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "makeThermo.H"</span></span><br><span class="line"></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "specie.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "perfectGas.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "myperfectGas.H" <span class="comment">// 新加的</span></span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "incompressiblePerfectGas.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "rhoConst.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "perfectFluid.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "PengRobinsonGas.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "adiabaticPerfectFluid.H"</span></span><br><span class="line"></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "hConstThermo.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "myhConstThermo.H" <span class="comment">// 新加的</span></span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "janafThermo.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "sensibleEnthalpy.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "sensibleInternalEnergy.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "mysensibleInternalEnergy.H" <span class="comment">// 新加的</span></span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "thermo.H"</span></span><br><span class="line"></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "constTransport.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "myconstTransport.H" <span class="comment">// 新加的</span></span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "sutherlandTransport.H"</span></span><br><span class="line"></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "icoPolynomial.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "hPolynomialThermo.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "polynomialTransport.H"</span></span><br><span class="line"></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "heRhoThermo.H"</span></span><br><span class="line"><span class="preprocessor">#<span class="keyword">include</span> "pureMixture.H"</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">namespace</span> Foam</span><br><span class="line">&#123;</span><br><span class="line"></span><br><span class="line">makeThermo</span><br><span class="line">(</span><br><span class="line">    rhoThermo,</span><br><span class="line">    heRhoThermo,</span><br><span class="line">    pureMixture,</span><br><span class="line">    myconstTransport,</span><br><span class="line">    mysensibleInternalEnergy,</span><br><span class="line">    myhConstThermo,</span><br><span class="line">    myperfectGas,</span><br><span class="line">    specie</span><br><span class="line">);</span><br><span class="line"></span><br><span class="line">&#125; <span class="comment">// End namespace Foam</span></span><br></pre></td></tr></table></figure></p>
<p>注意，头文件里有四个是新加的。 <code>makeThermo</code> 宏只调用了一次，即这里只增加了一个模型。其他的组合当然也是可以的，比如像这样<br><figure class="highlight lisp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">makeThermo</span><br><span class="line"><span class="list">(</span><br><span class="line">    <span class="keyword">rhoThermo</span>,</span><br><span class="line">    heRhoThermo,</span><br><span class="line">    pureMixture,</span><br><span class="line">    constTransport,</span><br><span class="line">    sensibleInternalEnergy,</span><br><span class="line">    hConstThermo,</span><br><span class="line">    myperfectGas,</span><br><span class="line">    specie</span><br><span class="line">)</span><span class="comment">;</span></span><br></pre></td></tr></table></figure></p>
<p>灵活组合就好了。</p>
<p>最后，将 <code>src/thermophysicalModels/basic</code> 目录下的 <code>Make</code> 拷贝到新模型所在目录下。并将 <code>files</code> 和 <code>options</code> 如下：</p>
<ul>
<li><p>files</p>
<figure class="highlight makefile"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">rhoThermos.C</span><br><span class="line"></span><br><span class="line"><span class="constant">LIB</span> = <span class="variable">$(FOAM_USER_LIBBIN)</span>/libMyTestfluidThermophysicalModels</span><br></pre></td></tr></table></figure>
</li>
<li><p>options</p>
<figure class="highlight haml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">EXE_INC = \</span><br><span class="line">    -<span class="ruby"><span class="constant">I</span><span class="variable">$(</span><span class="constant">LIB_SRC</span>)/finiteVolume/lnInclude \</span><br><span class="line"></span>    -<span class="ruby"><span class="constant">I</span><span class="variable">$(</span><span class="constant">LIB_SRC</span>)/thermophysicalModels/specie/lnInclude \</span><br><span class="line"></span>    -<span class="ruby"><span class="constant">I</span><span class="variable">$(</span><span class="constant">LIB_SRC</span>)/thermophysicalModels/basic/lnInclude \</span><br><span class="line"></span>    -<span class="ruby"><span class="constant">I</span><span class="variable">$(</span><span class="constant">LIB_SRC</span>)/meshTools/lnInclude </span><br><span class="line"></span></span><br><span class="line"></span><br><span class="line">LIB_LIBS = \</span><br><span class="line">    -<span class="ruby">lfiniteVolume \</span><br><span class="line"></span>    -<span class="ruby">lspecie \</span><br><span class="line"></span>    -<span class="ruby">lfluidThermophysicalModels</span></span><br></pre></td></tr></table></figure>
</li>
</ul>
<p>注意，这里也作了修改， <code>EXE_INC</code> 里增加了 <code>-I$(LIB_SRC)/thermophysicalModels/basic/lnInclude \</code> ； <code>LIB_LIBS</code> 里增加了两条： <code>-lspecie</code> 和 <code>-lfluidThermophysicalModels</code> 。</p>
<p>有了这些，就万事具备了，下面给出一个目录树：<br><figure class="highlight stylus"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line">├── const</span><br><span class="line">│   ├── myconstTransport<span class="class">.C</span></span><br><span class="line">│   ├── myconstTransport<span class="class">.H</span></span><br><span class="line">│   └── myconstTransportI<span class="class">.H</span></span><br><span class="line">├── hConst</span><br><span class="line">│   ├── myhConstThermo<span class="class">.C</span></span><br><span class="line">│   ├── myhConstThermo<span class="class">.H</span></span><br><span class="line">│   └── myhConstThermoI<span class="class">.H</span></span><br><span class="line">├── Make</span><br><span class="line">│   ├── files</span><br><span class="line">│   └── options</span><br><span class="line">├── perfectGas</span><br><span class="line">│   ├── myperfectGas<span class="class">.C</span></span><br><span class="line">│   ├── myperfectGas<span class="class">.H</span></span><br><span class="line">│   └── myperfectGasI<span class="class">.H</span></span><br><span class="line">├── rhoThermos<span class="class">.C</span></span><br><span class="line">└── sensibleInternalEnergy</span><br><span class="line">    └── mysensibleInternalEnergy.H</span><br></pre></td></tr></table></figure></p>
<p>运行 <code>wmake libso</code>，就能编译得到一个新的库了。</p>
<p>那么怎么调用新增的模型呢？分两步：</p>
<ol>
<li>修改 controlDict，增加一条 <code>libs ( &quot;libMyTestfluidThermophysicalModels.so&quot; );</code> </li>
<li>修改 <code>constant/thermophysicalProperties</code>，改为如下<figure class="highlight nginx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br></pre></td><td class="code"><pre><span class="line"><span class="title">thermoType</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="title">type</span>            heRhoThermo;</span><br><span class="line">    <span class="title">mixture</span>         pureMixture;</span><br><span class="line">    <span class="title">transport</span>       myconst;</span><br><span class="line">    <span class="title">thermo</span>          myhConst;</span><br><span class="line">    <span class="title">equationOfState</span> myperfectGas;</span><br><span class="line">    <span class="title">specie</span>          specie;</span><br><span class="line">    <span class="title">energy</span>          mysensibleInternalEnergy;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="title">pRef</span>            <span class="number">100000</span>;</span><br><span class="line"></span><br><span class="line"><span class="title">mixture</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="title">specie</span></span><br><span class="line">    &#123;</span><br><span class="line">        <span class="title">nMoles</span>          <span class="number">1</span>;</span><br><span class="line">        <span class="title">molWeight</span>       <span class="number">28</span>.<span class="number">9</span>;</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="title">thermodynamics</span></span><br><span class="line">    &#123;</span><br><span class="line">        <span class="title">Cp</span>              <span class="number">1000</span>;</span><br><span class="line">        <span class="title">Hf</span>              <span class="number">0</span>;</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="title">transport</span></span><br><span class="line">    &#123;</span><br><span class="line">        <span class="title">mu</span>              <span class="number">1</span>.8e-<span class="number">05</span>;</span><br><span class="line">        <span class="title">Pr</span>              <span class="number">0</span>.<span class="number">7</span>;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
</li>
</ol>
<p>这样改好以后，新模型就会被调用了。当运行求解器的时候出现如下内容，<br><figure class="highlight asciidoc"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="code">......</span><br><span class="line">......</span><br><span class="line">Reading thermophysical properties</span><br><span class="line"></span><br><span class="line">Selecting thermodynamics package </span><br><span class="line">&#123;</span><br><span class="line">    type            heRhoThermo;</span><br><span class="line">    mixture         pureMixture;</span><br><span class="line">    transport       myconst;</span><br><span class="line">    thermo          myhConst;</span><br><span class="line">    equationOfState myperfectGas;</span><br><span class="line">    specie          specie;</span><br><span class="line">    energy          mysensibleInternalEnergy;</span><br><span class="line">&#125;</span><br><span class="line">.......</span></span><br><span class="line">.......</span><br></pre></td></tr></table></figure></p>
<p>就表示新模型调用成功了。</p>
<p>最后提醒一下，这里的测试，只是将原有模型原封不动地拷贝出来了，只是改了 <code>tpeName</code>。实际应用场景肯定会比这个复杂，这里只是给出一个最基本的流程来供大家参考。</p>

      
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